The reason the PETA doesn't find any homes for their animals couldn't be precisely *because* those other organisations have already found all the available ones, now could it? If, to make a hypothetical example, YOU weren't going to volunteer in the first place, then if the PETA person on your doorstep said "but the other guys have placed a lot more of their animals; we *must* get this one placed to get as good a percentage as they've got!" -- would that make you change your mind? Naah, didn't think so...
Furthermore, seems to me they're comparing apples to zebras: They're talking about the PETA's "Norfolk, Virginia, headquarters" (my emphasis), in contrast to "the Norfolk, Va., SPCA" and "the Virginia Beach SPCA" -- apparently local organizations. Now, I don't know for sure at all, but it COULD very well, AFAICS, be that this means other, LOCAL, PETA shelters get some unknown (and unreported here) percentage of animals placed, and then *the rest* gets shipped off to headquarters for one more try -- or eventual termination, if they don't manage to place them either.
Actually, given your source and how "accurate" that has proved to be in the past, I'm all the more inclined to believe something like my scenario above IS closer to the truth, than their version -- just based on their track record alone.
You REALLY gotta stop treating that shitty WorldNetDaily tabloid as actual news, BOx.